Posted By tirc83:
It must be nearly impossible to remove a vignette successfully whereas adding one is simple enough and you get to control it exactly as you want.
You'd think so wouldn't you! But as you will have noticed they seem to sell well. As do highly saturated images with unfeasibly blue skies, which you would think would also be better left for the designer to saturate. In fact take a fairly standard landscape, saturate a little, add a vignette, and bingo - Vetta! (Have a look if you don't believe me.)
Perhaps the best test would be to upload a series, add a vignette to a few, and keep track of sales.